Connector for power batteries, power battery module, power battery pack and vehicle

ABSTRACT

A connector for power batteries, a power battery module, and a power battery pack are provided. The connector includes a main connection sheet, a first fixing sheet and a second fixing sheet, in which the main connection sheet is divided into first to third connection segments, the first connection segment and the second connection segment are non-coplanar, the first fixing sheet is connected to an edge of the first connection segment and a first predetermined angle is formed between the first fixing sheet and the first connection segment, the second fixing sheet is connected to an edge of the second connection segment and a second predetermined angle is formed between the second fixing sheet and the second connection segment, and each of the first predetermined angle and the second predetermined angle is larger than 0 degree and less than 180 degrees.

CROSS REFERENCE TO RELATED APPLICATION

This application is a continuation application of PCT Patent ApplicationNo. PCT/CN2015/091266, entitled “CONNECTOR FOR POWER BATTERIES, POWERBATTERY MODULE, POWER BATTERY PACK AND VEHICLE” filed on Sep. 30, 2015,which claims priority to Chinese Patent Application No. 201510639308.5,filed on Sep. 30, 2015 at State Intellectual Property Office, andChinese Patent Application No. 201520775282.2, filed on Sep. 30, 2015 atState Intellectual Property Office, all of which are incorporated byreference in their entirety.

TECHNICAL FIELD

Embodiments of the present disclosure generally relate to a field ofpower batteries, and more particularly, to a connector for powerbatteries, a power battery module, a power battery pack and a vehicle.

BACKGROUND

Power battery modules in a power battery pack are commonly connected toeach other via copper or aluminum braided wires, lamination guideplates, flat connection sheets or arch connection sheets. Although thebraided wire has flexibility, an end of the braided wire needs to bepressed into a connection end, thus resulting in a large contactresistance of the connection end. Moreover, in a complex operationcondition with frequent vibrations, the braided wire has low reliabilityand occupies a large space in a length direction. The lamination guideplate includes more than ten or even tens of layers of copper foils oraluminum foils, and the more than ten or even tens of layers of copperfoils or aluminum foils are pressed together at two ends of thelamination guide plate. Due to a larger number of the layers of copperfoils or aluminum foils, contact resistances of the two ends of thelamination guide plate are large and the lamination guide plategenerally is suitable for a one-dimensional flexible deformation, butnot for a three-dimensional flexible deformation. In addition, thelamination guide plate has a complex manufacturing process and a highcost. The flat or arch connection sheet has poor flexibility andvibration resistance, and is easy to be broken because of fatigue.

SUMMARY

Embodiments of the present disclosure seek to solve at least one of theproblems existing in the related art to at least some extent.

Accordingly, embodiments of the present disclosure provide a connectorfor power batteries, which has a simple configuration and a highreliability, occupies small space and is convenient to be connected andmanufactured.

Embodiments of the present disclosure further provide a power batterymodule including the above connector for power batteries.

Embodiments of the present disclosure further provide a power batterypack including the above connector for power batteries.

Embodiments of the present disclosure further provide a vehicleincluding the power battery pack.

Embodiments of a first aspect of the present disclosure provided aconnector for power batteries, including a main connection sheet, afirst fixing sheet configured to be connected to a first power battery,and a second fixing sheet configured to be connected to a second powerbattery, in which the main connection sheet is divided into a firstconnection segment, a second connection segment and a third connectionsegment connected between the first connection segment and the secondconnection segment in a longitudinal direction of the main connectionsheet, the first connection segment and the second connection segmentare non-coplanar, the first fixing sheet is connected to an edge of thefirst connection segment and a first predetermined angle is formedbetween a plane defined by the first fixing sheet and a plane defined bythe first connection segment, the second fixing sheet is connected to anedge of the second connection segment and a second predetermined angleis formed between a plane defined by the second fixing sheet and a planedefined by the second connection segment, the first predetermined angleis larger than 0 degree and less than 180 degrees, the secondpredetermined angle is larger than 0 degree and less than 180 degrees,the first fixing sheet and the first connection segment arenon-coplanar, and the second fixing sheet and the second connectionsegment are non-coplanar.

With the connector for power batteries according to embodiments of thepresent disclosure, the main connection sheet is divided into the firstconnection segment, the second connection segment and the thirdconnection segment, the third connection segment is configured to beconnected to the first connection segment and the second connectionsheet, and the first connection segment and the second connectionsegment are non-coplanar. Moreover, an included angle between the firstfixing sheet and the first connection segment is larger than 0 degreeand less than 180 degrees, and an included angle between the secondfixing sheet and the second connection segment is larger than 0 degreeand less than 180 degrees, so that the connector includes bends in atleast three directions, i.e., the connector has flexibility in at leastthree directions, thus greatly improving vibration-resistant reliabilityof the connector. The connector has a simple structure and a low cost,occupies small space and is convenient to be manufactured. Furthermore,a braided wire structure is replaced with the connector, and it does notneed to press wires at a connection point, thus reducing a contactresistance thereof.

Embodiments of a second aspect of the present disclosure provide a powerbattery module, including a plurality of power batteries, in whichadjacent power batteries are connected to each via a connecter for powerbatteries according to above embodiments of the present disclosure.

Embodiments of a third aspect of the present disclosure provide powerbattery pack, including a plurality of power battery modules, in whichadjacent power battery modules are connected to each via a connecter forpower batteries according to above embodiments of the presentdisclosure.

Embodiments of a fourth aspect of the present disclosure provide avehicle, including a power battery pack according to embodiments of thepresent disclosure.

Additional aspects and advantages of embodiments of present disclosurewill be given in part in the following descriptions, become apparent inpart from the following descriptions, or be learned from the practice ofthe embodiments of the present disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

These and other aspects and advantages of embodiments of the presentdisclosure will become apparent and more readily appreciated from thefollowing descriptions made with reference to the accompanying drawings,in which:

FIG. 1 is a schematic view of a connector according to an embodiment ofthe present disclosure;

FIG. 2 is a schematic view of a connector from another perspectiveaccording to an embodiment of the present disclosure;

FIG. 3 is a schematic view of a connector from another perspectiveaccording to an embodiment of the present disclosure; and

FIG. 4 is a schematic view of a connector according to anotherembodiment of the present disclosure.

REFERENCE NUMERALS

connector 100;

first fixing sheet 10; first connection hole 11; groove 12;

second fixing sheet 20; second connection hole 21;

first connection segment 30; second connection segment 40; secondconnection segment 50.

DETAILED DESCRIPTION

Reference will be made in detail to embodiments of the presentdisclosure. Embodiments of the present disclosure will be shown indrawings, in which the same or similar elements and the elements havingsame or similar functions are denoted by like reference numeralsthroughout the descriptions. The embodiments described herein accordingto drawings are explanatory and illustrative, not construed to limit thepresent disclosure.

A connector for power batteries according to embodiments of the presentdisclosure will be described in the following with reference todrawings.

As shown in FIGS. 1-4, the connector 100 according to embodiments of thepresent disclosure includes a main connection sheet, a first fixingsheet 10 configured to be connected to a first power battery and asecond fixing sheet 20 configured to be connected to a second powerbattery. The main connection sheet is divided into a first connectionsegment 30, a second connection segment 40 and a third connectionsegment 50 connected between the first connection segment 30 and thesecond connection segment 40. The first connection segment 30 and thesecond connection segment 40 are non-coplanar. The first fixing sheet 10is connected to an edge of the first connection segment 30 and a firstpredetermined angle is formed between a plane in which the first fixingsheet 10 is and a plane in which the first connection segment 30 is. Thesecond fixing sheet 20 is connected to an edge of the second connectionsegment 40 and a second predetermined angle is formed between a plane inwhich the second fixing sheet 20 is and a plane in which the secondconnection segment 40 is. The first predetermined angle is larger than 0degree and less than 180 degrees and the second predetermined angle islarger than 0 degree and less than 180 degrees. The first fixing sheet10 and the first connection segment 30 are non-coplanar, and the secondfixing sheet 20 and the second connection segment 40 are non-coplanar.

In other words, the connector 100 according to embodiments of thepresent disclosure mainly includes the main connection sheet, the firstfixing sheet 10 and the second fixing sheet 20. In embodiments of thepresent disclosure, the connector 100 generally is used to connect twopower batteries which may be referred as the first power battery and thesecond power battery. The first fixing sheet 10 is connected to thefirst power battery, and the second fixing sheet 20 is connected secondpower battery.

The main connection sheet includes the first connection segment 30, thesecond connection segment 40 and the third connection segment 50. Thefirst connection segment 30, the second connection segment 40 and thethird connection segment 50 extend in a length direction of the mainconnection sheet, i.e., in a left and right direction as shown inFIG. 1. Each of the first connection segment 30, the second connectionsegment 40 and the third connection segment 50 may be configured asegment having a long-strip shape. The third connection segment 50 isdisposed between the first connection segment 30 and the secondconnection segment 40 so as to be connected to the first connectionsegment 30 and the second connection segment 40. Moreover, the firstconnection segment 30 and the second connection segment 40 arenon-coplanar.

The first fixing sheet 10 is disposed at the first connection segment 30and is connected to the edge of the first connection segment 30, anangle formed between the plane in which the first fixing sheet 10 is andthe plane in which the first connection segment 30 is the firstpredetermined angle, and the first predetermined angle is larger than 0degree and less than 180 degrees. The second fixing sheet 20 is disposedat the second connection segment 40 and connected to the edge of thesecond connection segment 40, an angle formed between the plane in whichthe second fixing sheet 20 is and the plane in which the secondconnection segment 40 is the second predetermined angle, and the secondpredetermined angle is larger than 0 degree and less than 180 degrees.The plane in which the first fixing sheet 10 is and the plane in whichthe first connection segment 30 is are non-coplanar, and the plane inwhich the second fixing sheet 20 is and the plane in which the secondconnection segment 40 is are non-coplanar.

With the connector 100 for power batteries according to embodiments ofthe present disclosure, the main connection sheet is divided into thefirst connection segment 30, the second connection segment 40 and thethird connection segment 50, the third connection segment 50 isconfigured to be connected to the first connection segment 30 and thesecond connection sheet 40, and the first connection segment 30 and thesecond connection segment 40 are non-coplanar. Moreover, an includedangle between the first fixing sheet 10 and the first connection segment30 is larger than 0 degree and less than 180 degrees, and an includedangle between the second fixing sheet 20 and the second connectionsegment 40 is larger than 0 degree and less than 180 degrees, so thatthe connector 100 includes bends in at least three directions, i.e., theconnector has flexibility in at least three directions, thus greatlyimproving vibration-resistant reliability of the connector 100. Theconnector 100 has a simple structure and a low cost, occupies smallspace and is convenient to be manufactured. Furthermore, a braided wirestructure is replaced with the connector 100, and it does not need topress wires at a connection point, thus reducing a contact resistancethereof.

According to an embodiment of the present disclosure, the firstconnection segment 30 and the second connection segment 40 are parallelwith each other.

Specifically, as shown in FIG. 1, each of the first connection segment30 and the second connection segment 40 is configured as a sheetextending in a horizontal direction, i.e., the left and right directionin FIG. 1. The second connection segment 40 is located above the firstconnection segment 30 in a vertical direction, i.e., an up and downdirection in FIG. 1. The third connection segment 50 extends in thesubstantially vertical direction so as to be connected to the firstconnection segment 30 and the second connection segment 40. A lower endof the third connection segment 50 is connected to the first connectionsegment 30 and an upper end of the third connection segment 50 isconnected to the second connection segment 40. Thus, the connector 100has a simple structure, good vibration-resistant performance and highstability, and is convenient to be manufactured.

In some embodiments of the present disclosure, each of the firstpredetermined angle and the second predetermined angle is 90 degrees.That is, the first fixing sheet 10 is perpendicularly connected to theedge of the first connection segment 30, and the second fixing sheet 20is perpendicularly connected to the edge of the second connectionsegment 40. When the first connection segment 30 is parallel with thesecond connection segment 40, the first fixing sheet 10 is parallel withthe second fixing sheet 20. Thus, with a configuration in which thefirst connection segment 30 is parallel with the second connectionsegment 40 and the first fixing sheet 10 is parallel with the secondfixing sheet 20, the connector 100 has a reasonable structure and bettervibration-resistant performance.

According to an embodiment of the present disclosure, the first fixingsheet 10 and the second fixing sheet 20 are at a same side of the mainconnection sheet. In some embodiments, the first fixing sheet 10 and thesecond fixing sheet 20 are coplanar.

As shown in FIG. 1, in embodiments of the present disclosure, the firstfixing sheet 10 and the second fixing sheet 20 are at rear sides of thefirst connection segment 30 and the second connection segment 40, andperpendicularly connected to rear edges of the first connection segment30 and the second connection segment 40 respectively, and the firstfixing sheet 10 and the second fixing sheet 20 are in a same plane.

In other embodiments of the present disclosure, the first fixing sheet10 and the second fixing sheet 20 extend from the main connection sheetin a same direction or in opposite directions.

In other words, in embodiments of the present disclosure, as shown inFIGS. 1 to 4, the connector 100 may be configured in such a manner thatthe first fixing sheet 10 extends upwards from an upper surface of thefirst connection segment 30, the second connection segment 40 is locatedabove the first connection segment 30, the second fixing sheet 20extends downwards from a lower surface of the second connection segment40, or the first fixing sheet 10 extends upwards from the upper surfaceof the first connection segment 30, the second connection segment 40 islocated above the first connection segment 30, and the second fixingsheet 20 extends from an upper surface of the second connection segment40.

According to an embodiment of the present disclosure, the first fixingsheet 10 is adjacent a free end of the first connection segment 30, andthe second fixing sheet 20 is adjacent to a free end of the secondconnection segment 40. Furthermore, an edge of the first fixing sheet 10adjacent to the free end of the first connection segment 30 is flushwith an end surface of the free end of the first connection segment 30,and an edge of the second fixing sheet 20 adjacent to the free end ofthe second connection segment 40 is flush with an end surface of thefree end of the second connection segment 40.

Specifically, as shown in FIG. 1, the first fixing sheet 10 is disposedat a left end of the first connection segment 30, and the second fixingsheet 20 is disposed at a right end of the second connection segment 40.A edge of a left end of the first fixing sheet 10 is flush with an edgeof the left end of the first connection segment 30, and an edge of aright end of the second fixing sheet 20 is flush with an edge of theright end of the second connection segment 40. Thus, the connector 100has a more flat structure.

In some embodiments of the present disclosure, the third connectionsegment 50 is configured to have a substantial S shape.

As shown in FIG. 4, the first connection segment 30 is connected to thesecond connection segment 40 via the third connection segment 50 havingthe S shape, i.e., a lower end of the third connection segment 50 havingthe S shape is connected to the first connection segment 30, and anupper end of the third connection segment 50 having the S shape isconnected to the second connection segment 40. Thus, the connector 100has good buffering performance and vibration-resistant performance.

According to an embodiment of the present disclosure, the connector 100is integrally formed by bending a single mental sheet, i.e., the firstfixing sheet 10, the second fixing sheet 20, the first connectionsegment 30, the second connection segment 40 and the third connectionsegment 50 are integrally formed as the metal sheet. Furthermore, themain connection sheet, the first fixing sheet 10 and the second fixingsheet 20 may be integrally formed as a copper sheet or an aluminumsheet. That is, the connector 100 may be the copper sheet or thealuminum sheet, or another metal sheet commonly used in the related art.

Thus, the integrally formed connector 10 ensures the stability of thewhole structure, and is convenient to be molded, thus further reducingthe manufacturing cost. In addition, the connector 10 does not have acontact resistance due to the integrally formed structure thereof.

In some embodiments, arc bends are connected between the first fixingsheet 10 and the first connection segment 30, between the second fixingsheet 20 and the second connection segment 40, between the thirdconnection segment 50 and the first connection segment 30, and betweenthe third connection segment 50 and the second connection segment 40. Inother words, the first fixing sheet 10 is connected to the firstconnection segment 30 via a first arc bend, the second fixing sheet 20is connected to the second connection segment 40 via a second arc bend,the third connection segment 50 is connected to the first connectionsegment 30 via a third arc bend, and the third connection segment 50 isconnected to the second connection segment 40 via a fourth bend. Thus,the vibration-resistant reliability of the connector 100 is furtherimproved.

According to an embodiment of the present disclosure, the mainconnection sheet has a groove 12 penetrated therethrough in a thicknessthereof. Moreover, the groove 12 extends into the first fixing sheet 10and the second fixing sheet 20. Furthermore, a plurality of grooves 12is formed in the main connection sheet and parallel with each other.

In other words, in embodiments of the present disclosure, the groove 12is formed in each of the first connection segment 30, the secondconnection segment 40 and the third connection segment 50 of the mainconnection sheet, and the grooves 12 in the first connection segment 30,the second connection segment 40 and the third connection segment 50communicates with each other. In some embodiments, the grooves 12 mayfurther extend into the first fixing sheet 10 and the second fixingsheet 20, and extend in the first fixing sheet 10 and the second fixingsheet 20 by a predetermined length respectively, in which thepredetermined length may be adjusted reasonably according to actualrequirements. For example, the predetermined length may be 1/10 to ¼ ofa length of the first fixing sheet 10 or the second fixing sheet 20.

One or more grooves 12 may be provided in the main connection sheet.Preferably, the plurality of grooves 12 is provided and parallel witheach other.

Thus, by providing the grooves 12 extending in extending directions ofparts of the connector 100, the buffering performance of the connector100 is further improved and the vibration-resistant reliability isensured.

In some embodiments of the present disclosure, the first fixing sheet 10has a first connection hole 11, and the second fixing sheet 20 has asecond connection hole 21. Furthermore, two first connection holes 11are formed in the first fixing sheet 10, and arranged and spaced awayfrom each other in the longitudinal direction of the main connectionsheet, and two second connection holes 12 are formed in the secondfixing sheet 20, and arranged and spaced away from each other in thelongitudinal direction of the main connection sheet.

The first fixing sheet 10 may be connected to the first power batteryvia the first connection hole 11, and the second fixing sheet 20 may beconnected to the second power battery via the second connection hole 21.The two first connection holes 11 are spaced away from each other in thelongitudinal direction of the main connection sheet, and the two secondconnection hole 21 are spaced away from each other in the longitudinaldirection of the main connection sheet, and thus it is more convenientfor the connector 100 to be connected to the power battery, and theconnector 10 has better stability and vibration-resistant performance.

According to an embodiment of the present disclosure, a metal coating isdisposed on the connector 100, i.e., the metal coating is disposed oneach of the main connection sheet, the first fixing sheet 10 and thesecond fixing sheet 20. In some embodiments, the metal coating may be anelectrodeposited coating or a chemical coating. Therefore, by disposingthe metal coating on the connector 100, the oxidation-resistantperformance of the connector 100 is improved significantly, thuslengthening a working life of the connector 100.

In some embodiments of the present disclosure, each of the firstconnection segment 30, the second connection segment 40, the thirdconnection segment 50, the first fixing sheet 10 and the second fixingsheet 20 has a rectangle shape. In some embodiments, each corner of eachof the first connection segment 30, the second connection segment 40,the third connection segment 50, the first fixing sheet 10 and thesecond fixing sheet 20 is rounded off.

Thus, the sheet having the rectangle shape has relatively high structurestability and higher vibration-resistant performance. Each corner of thesheet is rounded off, i.e., each corner of an outline of the connector100 is configured as a rounded corner, thus avoiding damages on a personby a pointedness at a connection point and an external pointedness.

A power battery module according to embodiments of the presentdisclosure includes a plurality of power batteries, and adjacent powerbatteries are connected to each via the connecter 100 for powerbatteries according to above embodiments of the present disclosure.Adjacent two power batteries may be arranged in a longitudinal directionof the main connection sheet or in a lateral direction, and theconnectors 100 in different above embodiments may be used in differentarrangements of the power batteries.

A power battery pack according to embodiments of the present disclosureincludes a plurality of power battery modules, and adjacent powerbattery modules are connected to each via the connecter 100 for powerbatteries according to above embodiments of the present disclosure.Adjacent two power battery modules may be arranged in a longitudinaldirection of the main connection sheet or in a lateral direction, andthe connectors 100 in different above embodiments may be used indifferent arrangements of the power battery modules.

Since the connector 100 for power batteries according to aboveembodiments of the present disclosure has above technical effects, eachof the power battery module and the power battery pack according toembodiments of the present disclosure has corresponding technicaleffects, i.e., each of the power battery module and the power batterypack according to embodiments of the present disclosure has a simplestructure and a high vibration-resistant performance, and is easy to beassembled.

A vehicle according to embodiments of the present disclosure includesthe power battery pack according to above embodiments of the presentdisclosure. Since the connector 100 for power batteries according toabove embodiments of the present disclosure has above technical effects,the vehicle according to embodiments of the present disclosure hascorresponding technical effects, i.e., the vehicle according toembodiments of the present disclosure has a simple structure and a highvibration-resistant performance, and is easy to be assembled.

Other configurations and operations of the vehicle according to theembodiment of the present disclosure are known by those skilled in therelated art, which are omitted herein.

In the specification, unless specified or limited otherwise, relativeterms such as “central”, “longitudinal”, “lateral”, “front”, “rear”,“right”, “left”, “inner”, “outer”, “lower”, “upper”, “horizontal”,“vertical”, “above”, “below”, “up”, “top”, “bottom”, “inner”, “outer”,“clockwise”, “anticlockwise” as well as derivative thereof (e.g.,“horizontally”, “downwardly”, “upwardly”, etc.) should be construed torefer to the orientation as then described or as shown in the drawingsunder discussion. These relative terms are for convenience ofdescription and do not require that the present disclosure beconstructed or operated in a particular orientation.

In addition, terms such as “first” and “second” are used herein forpurposes of description and are not intended to indicate or implyrelative importance or significance. Thus, features limited by “first”and “second” are intended to indicate or imply including one or morethan one these features. In the description of the present disclosure,“a plurality of” relates to two or more than two.

In the description of the present disclosure, unless specified orlimited otherwise, it should be noted that, terms “mounted,” “connected”and “coupled” may be understood broadly, such as permanent connection ordetachable connection, electronic connection or mechanical connection,direct connection or indirect connection via intermediary, innercommunication or interaction between two elements. These having ordinaryskills in the art should understand the specific meanings in the presentdisclosure according to specific situations.

In the description of the present disclosure, a structure in which afirst feature is “on” a second feature may include an embodiment inwhich the first feature directly contacts the second feature, and mayalso include an embodiment in which an additional feature is formedbetween the first feature and the second feature so that the firstfeature does not directly contact the second feature, unless otherwisespecified. Furthermore, a first feature “on,” “above,” or “on top of” asecond feature may include an embodiment in which the first feature isright “on,” “above,” or “on top of” the second feature, and may alsoinclude an embodiment in which the first feature is not right “on,”“above,” or “on top of” the second feature, or just means that the firstfeature has a sea level elevation larger than the sea level elevation ofthe second feature. While first feature “beneath,” “below,” or “onbottom of” a second feature may include an embodiment in which the firstfeature is right “beneath,” “below,” or “on bottom of” the secondfeature, and may also include an embodiment in which the first featureis not right “beneath,” “below,” or “on bottom of” the second feature,or just means that the first feature has a sea level elevation smallerthan the sea level elevation of the second feature.

Reference throughout this specification to “an embodiment,” “someembodiments,” “one embodiment”, “another example,” “an example,” “aspecific example,” or “some examples,” means that a particular feature,structure, material, or characteristic described in connection with theembodiment or example is included in at least one embodiment or exampleof the present disclosure. Thus, the appearances of the phrases such as“in some embodiments,” “in one embodiment”, “in an embodiment”, “inanother example,” “in an example,” “in a specific example,” or “in someexamples,” in various places throughout this specification are notnecessarily referring to the same embodiment or example of the presentdisclosure. Furthermore, the particular features, structures, materials,or characteristics may be combined in any suitable manner in one or moreembodiments or examples.

Although explanatory embodiments have been shown and described, it wouldbe appreciated by those skilled in the art that the above embodimentscannot be construed to limit the present disclosure, and changes,alternatives, and modifications can be made in the embodiments withoutdeparting from spirit, principles and scope of the present disclosure.

What is claimed is:
 1. A connector for power batteries, comprising: amain connection sheet; a first fixing sheet configured to be connectedto a first power battery; and a second fixing sheet configured to beconnected to a second power battery, wherein the main connection sheetis divided into a first connection segment, a second connection segmentand a third connection segment connected between the first connectionsegment and the second connection segment in a longitudinal direction ofthe main connection sheet, the first connection segment and the secondconnection segment are non-coplanar, the first fixing sheet is connectedto an edge of the first connection segment and a first predeterminedangle is formed between a plane defined by the first fixing sheet and aplane defined by the first connection segment, the second fixing sheetis connected to an edge of the second connection segment and a secondpredetermined angle is formed between a plane defined by the secondfixing sheet and a plane defined by the second connection segment, thefirst predetermined angle is larger than 0 degree and less than 180degrees, the second predetermined angle is larger than 0 degree and lessthan 180 degrees, the first fixing sheet and the first connectionsegment are non-coplanar, and the second fixing sheet and the secondconnection segment are non-coplanar.
 2. The connector for powerbatteries according to claim 1, wherein the first connection segment isparallel with the second connection segment.
 3. The connector for powerbatteries according to claim 1, wherein each of the first predeterminedangle and the second predetermined angle is 90 degrees.
 4. The connectorfor power batteries according to claim 1, wherein the first fixing sheetand the second fixing sheet are at a same side of the main connectionsheet.
 5. The connector for power batteries according to claim 4,wherein the first fixing sheet and the second fixing sheet are coplanar.6. The connector for power batteries according to claim 1, wherein thefirst fixing sheet and the second fixing sheet extend from the mainconnection sheet in a same direction or in opposite directions.
 7. Theconnector for power batteries according to claim 1, wherein the firstfixing sheet is adjacent to a free end of the first connection segment,and the second fixing sheet is adjacent to a free end of the secondconnection segment.
 8. The connector for power batteries according toclaim 7, wherein an edge of the first fixing sheet adjacent to the freeend of the first connection segment is flush with an end surface of thefree end of the first connection segment, and an edge of the secondfixing sheet adjacent to the free end of the second connection segmentis flush with an end surface of the free end of the second connectionsegment.
 9. The connector for power batteries according to claim 1,wherein the third connection segment is configured to have a substantialS shape.
 10. The connector for power batteries according to claim 1,wherein the connector is integrally formed by bending a single mentalsheet.
 11. The connector for power batteries according to claim 1,wherein the first fixing sheet is connected to the first connectionsegment via a first arc bend, the second fixing sheet is connected tothe second connection segment via a second arc bend, the thirdconnection segment is connected to the first connection segment via athird arc bend, and the third connection segment is connected to thesecond connection segment via a fourth bend.
 12. The connector for powerbatteries according to claim 1, wherein the main connection sheetdefines a groove penetrated therethrough in a thickness thereof alongthe longitudinal direction of the main connection sheet.
 13. Theconnector for power batteries according to claim 12, wherein the grooveextends into the first fixing sheet and the second fixing sheet.
 14. Theconnector for power batteries according to claim 12, wherein a pluralityof grooves is formed in the main connection sheet and parallel with eachother.
 15. The connector for power batteries according to claim 1,wherein the first fixing sheet defines a first connection hole and thesecond fixing sheet defines a second connection hole.
 16. The connectorfor power batteries according to claim 15, wherein two first connectionholes are formed in the first fixing sheet, and arranged and spaced awayfrom each other in the longitudinal direction of the main connectionsheet, and two second connection holes are formed in the second fixingsheet, and arranged and spaced away from each other in the longitudinaldirection of the main connection sheet.
 17. The connector for powerbatteries according to claim 1, wherein the main connection sheet, thefirst fixing sheet and the second fixing sheet are made of copper oraluminum.
 18. The connector for power batteries according to claim 1,wherein a metal coating is disposed on the main connection sheet, thefirst fixing sheet and the second fixing sheet.
 19. The connector forpower batteries according to claim 18, wherein the metal coating is anelectrodeposited coating or a chemical coating.
 20. A power batterymodule, comprising a plurality of power batteries, wherein adjacentpower batteries are connected to each via a connecter for powerbatteries, the connector including: a main connection sheet; a firstfixing sheet configured to be connected to a first power battery; and asecond fixing sheet configured to be connected to a second powerbattery, wherein the main connection sheet is divided into a firstconnection segment, a second connection segment and a third connectionsegment connected between the first connection segment and the secondconnection segment in a longitudinal direction of the main connectionsheet, the first connection segment and the second connection segmentare non-coplanar, the first fixing sheet is connected to an edge of thefirst connection segment and a first predetermined angle is formedbetween a plane defined by the first fixing sheet and a plane defined bythe first connection segment, the second fixing sheet is connected to anedge of the second connection segment and a second predetermined angleis formed between a plane defined by the second fixing sheet and a planedefined by the second connection segment, the first predetermined angleis larger than 0 degree and less than 180 degrees, the secondpredetermined angle is larger than 0 degree and less than 180 degrees,the first fixing sheet and the first connection segment arenon-coplanar, and the second fixing sheet and the second connectionsegment are non-coplanar.